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6
Common metals and their alloys; metal building materials; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery, small items of metal hardware; pipes and tubes of metal; safes; goods of common metal not included in other classes; ores.
pipes, pipework and tubes of metal; metal pipe liners, metal sliding sleeves and metal casings for stabilizing, securing, and sealing the wellbore in oil, gas and water wells and boreholes, and more specifically for use in fluid injection, production control, zone shut-off, or zone restriction for use in oil, gas and water wells and boreholes
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7
Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs.
pump control valves and valves for pumps, sleeve valves as machine components, sliding valves as machine components, and ball valves as machine components for completing and producing fluids from oil, gas, condensate and water wells, well bores and boreholes, more specifically for use in flow control and flow
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37
Building construction; repair; installation services
down-hole services relating to oil, gas, condensate and water wells, well bores and boreholes, namely, well intervention in the nature of drilling, casing, tubing, drill pipe installation, and cementing; oil, water and gas pumping; cementing services for oil and gas wells; hydraulic fracturing and acidizing services of subsurface geologic formations to enhance well production; oil, gas and water field exploitation services, namely, extracting oil, gas and water
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42
Scientific and technological services and research and design relating thereto; industrial analysis and research services; design and development of computer hardware and software
engineering relating to oil, gas, condensate and water field exploration; new product design and consultancy services relating to oil, gas, condensate and water field exploration; oil, gas and water field exploration services; rental of oil, gas and water field exploration equipment, namely, computers, for use in exploration for oil, gas and water; providing information, advisory and consultancy services in relation to the aforesaid services